Yazar "Dogruer, Tufan" seçeneğine göre listele

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    Decoupling contro of a twin rotor MIMO system using optimization method
    (Ieee, 2019) Dogruer, Tufan; Tan, Nusret
    This paper presents an optimization method on the real-time decoupling control for the TRMS system. It can be stated that TRMS has a complex structure due to its nonlinear structure, cross-couplings, two inputs and two outputs. Despite its complex structure, the TRMS is widely preferred in control applications as it allows to test the controller performances. The pitch and yaw position control in TRMS has been investigated in many studies, but its decoupling control has only been discussed in a limited number of studies. In this study, the real-time decoupling control of the TRMS was performed using fractional order PID. A Genetic Algorithm based optimization method was used for determining the parameters of the fractional order PID controller. The conventional PID was compared with the fractional order PID, and the results showed that the decoupling control of the TRMS using the fractional order PID was more successful. The method applied offers a highly effective control in real-time decoupling control of the TRMS.
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    Design of Phase Lead and Phase Lag Filters for Fractional Order Systems
    (Ieee, 2015) Dogruer, Tufan; Tan, Nusret
    In this paper, a method is presented to design phase lead and phase lag filters for fractional order systems. Design of the controller in the control systems could be considered as a filter design. Therefore, the methods used for the controller design can be implemented in filter design. There are two parameters to be determined while performing phase lead and phase lag filters design. In this study, the design steps which are used for the determination of these parameters are given in third section. The method has been applied to a fractional order transfer function and the results obtained were presented as graphs. The success of the method can be seen clearly from the results obtained.
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    Design of PI Controller using Optimization Method in Fractional Order Control Systems
    (Elsevier, 2018) Dogruer, Tufan; Tan, Nusret
    In control systems, controller preference and design is an important issue for meeting the desired design criteria. In this paper, PI controller design was performed by using optimization method for fractional order systems. First, all the PI controller parameters that make the control system stable are calculated by using the stability boundary locus method. However, each controller parameter selected in the stability region may not be able to optimally control the system. Optimal controller parameters that provide the best control from the PI controller parameters that make the system stable by using the optimization method are obtained. In the optimization process, the optimal PI controller parameters are calculated by using the integral performance criterion based on the error. Simulation studies have been done for closed loop control system including a fractional order transfer function with time delay. It has been shown that the presented method can be successfully applied to fractional order control systems. (C) 2018, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.
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    Lead and lag controller design in fractional-order control systems
    (Sage Publications Ltd, 2019) Dogruer, Tufan; Tan, Nusret
    This paper presents a controller design method using lead and lag controllers for fractional-order control systems. In the presented method, it is aimed to minimize the error in the control system and to obtain controller parameters parametrically. The error occurring in the system can be minimized by integral performance criteria. The lead and lag controllers have three parameters that need to be calculated. These parameters can be determined by the simulation model created in the Matlab environment. In this study, the fractional-order system in the model was performed using Matsuda's fourth-order integer approximation. In the optimization model, the error is minimized by using the integral performance criteria, and the controller parameters are obtained for the minimum error values. The results show that the presented method gives good step responses for lead and lag controllers.
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    Root-Locus Analysis of Fractional Order Transfer Functions Using LabVIEW: An Interactive Application
    (Ieee, 2018) Yuce, Ali; Tan, Nusret; Dogruer, Tufan
    The analysis of the open loop system in the design of the closed loop control systems is very important and useful in terms of being able to learn how the closed loop system will behave. In this paper, root locus graph of fractional order transfer function is plotted with the developed application using LabVIEW graphical programming language. A user panel has been designed using the LabVIEW graphical programming language. Interactive user panel is basic and user friendly for the computation and analysis. The root locus graph of the fractional order transfer function can interactively be plotted. Matsuda method is preferred for integer order approximation. With the interactive feature of developed application, the unit step response of closed loop control system can be plotted for a selected gain on the root locus graph panel. The application which has a rich graphical interface and interactive feature can also be used in teaching of fractional order control theory.